All elements test

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The all elements rule or all limitations rule (often written with a hyphen after "all") is a legal test used in US patent law to determine whether a given reference shows that a patent claim [1] lacks the novelty required to be valid. The rule is also applicable to an obviousness analysis. [2] Under the rule, a single reference (for anticipation) or the combination of references relied upon, plus the ordinary knowledge of persons skilled in the art (for obviousness), must provide each claimed element. For anticipation, and under certain circumstances for obviousness, the doctrine of inherency may be relied on to meet this test.

In a patent or patent application, the claims define, in technical terms, the extent, i.e. the scope, of the protection conferred by a patent, or the protection sought in a patent application. In other words, the purpose of the claims is to define which subject-matter is protected by the patent. This is termed as the "notice function" of a patent claim—to warn others of what they must not do if they are to avoid infringement liability. The claims are of the utmost importance both during prosecution and litigation alike.

Novelty is a requirement for a patent claim to be patentable. An invention is not new and therefore not patentable if it was known to the public before the filing date of the patent application, or before its date of priority if the applicant claims priority of an earlier patent application. The purpose of the novelty requirement is to prevent prior art from being patented again.

In United States patent law, the doctrine of inherency holds that, under certain circumstances, prior art may be relied upon not only for what it expressly teaches, but also for what is inherent therein, i.e., what necessarily flows from the express teachings. For a patent claim to be valid, its subject-matter must be novel and non-obvious. The claim is anticipated if a single prior art reference, either expressly or inherently, discloses every feature of the claimed invention. The concept of inherency is predicated on the idea that a claim should not pass the test of anticipation merely because a feature of it is undisclosed or unrecognized in the prior art reference. A prior art source may thus still anticipate if an apparently missing element of the claim is inherent in that prior art source.

See also

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<i>Perfect Web Technologies, Inc. v. InfoUSA, Inc.</i>

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<i>Apotex Inc v Sanofi-Synthelabo Canada Inc</i>

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References

  1. ↑ In order to demonstrate anticipation, the proponent must show “that the four corners of a single, prior art document describe every element of the claimed invention.” Advanced Display Sys., Inc. v. Kent State Univ., 212 F.3d 1272, 1282 (Fed. Cir. 2000). Moreover, the reference must also disclose those elements “arranged as in the claim.” Connell v. Sears, Roebuck & Co., 722 F.2d 1542, 1548 (Fed. Cir. 1983).
  2. ↑ See Beckson Marine, Inc. v. NFM, Inc., 292 F.3d 718, 727 (Fed. Cir. 2002) (holding that for claimed subject matter to be obvious either the prior art references must expressly reach each claim limitation exactly or else the record must disclose a reason for a person of ordinary skill in the art to modify the prior art teachings to obtain the claimed invention).
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